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perf buildid: Fix possible unterminated readlink() result buffer
[linux-2.6/linux-mips.git] / drivers / video / mx3fb.c
blob7e3a490e8d76d882555f58a752242360a6ed948b
1 /*
2 * Copyright (C) 2008
3 * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
4 *
5 * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/platform_device.h>
15 #include <linux/sched.h>
16 #include <linux/errno.h>
17 #include <linux/string.h>
18 #include <linux/interrupt.h>
19 #include <linux/slab.h>
20 #include <linux/fb.h>
21 #include <linux/delay.h>
22 #include <linux/init.h>
23 #include <linux/ioport.h>
24 #include <linux/dma-mapping.h>
25 #include <linux/dmaengine.h>
26 #include <linux/console.h>
27 #include <linux/clk.h>
28 #include <linux/mutex.h>
29
30 #include <mach/dma.h>
31 #include <mach/hardware.h>
32 #include <mach/ipu.h>
33 #include <mach/mx3fb.h>
34
35 #include <asm/io.h>
36 #include <asm/uaccess.h>
37
38 #define MX3FB_NAME "mx3_sdc_fb"
39
40 #define MX3FB_REG_OFFSET 0xB4
41
42 /* SDC Registers */
43 #define SDC_COM_CONF (0xB4 - MX3FB_REG_OFFSET)
44 #define SDC_GW_CTRL (0xB8 - MX3FB_REG_OFFSET)
45 #define SDC_FG_POS (0xBC - MX3FB_REG_OFFSET)
46 #define SDC_BG_POS (0xC0 - MX3FB_REG_OFFSET)
47 #define SDC_CUR_POS (0xC4 - MX3FB_REG_OFFSET)
48 #define SDC_PWM_CTRL (0xC8 - MX3FB_REG_OFFSET)
49 #define SDC_CUR_MAP (0xCC - MX3FB_REG_OFFSET)
50 #define SDC_HOR_CONF (0xD0 - MX3FB_REG_OFFSET)
51 #define SDC_VER_CONF (0xD4 - MX3FB_REG_OFFSET)
52 #define SDC_SHARP_CONF_1 (0xD8 - MX3FB_REG_OFFSET)
53 #define SDC_SHARP_CONF_2 (0xDC - MX3FB_REG_OFFSET)
54
55 /* Register bits */
56 #define SDC_COM_TFT_COLOR 0x00000001UL
57 #define SDC_COM_FG_EN 0x00000010UL
58 #define SDC_COM_GWSEL 0x00000020UL
59 #define SDC_COM_GLB_A 0x00000040UL
60 #define SDC_COM_KEY_COLOR_G 0x00000080UL
61 #define SDC_COM_BG_EN 0x00000200UL
62 #define SDC_COM_SHARP 0x00001000UL
63
64 #define SDC_V_SYNC_WIDTH_L 0x00000001UL
65
66 /* Display Interface registers */
67 #define DI_DISP_IF_CONF (0x0124 - MX3FB_REG_OFFSET)
68 #define DI_DISP_SIG_POL (0x0128 - MX3FB_REG_OFFSET)
69 #define DI_SER_DISP1_CONF (0x012C - MX3FB_REG_OFFSET)
70 #define DI_SER_DISP2_CONF (0x0130 - MX3FB_REG_OFFSET)
71 #define DI_HSP_CLK_PER (0x0134 - MX3FB_REG_OFFSET)
72 #define DI_DISP0_TIME_CONF_1 (0x0138 - MX3FB_REG_OFFSET)
73 #define DI_DISP0_TIME_CONF_2 (0x013C - MX3FB_REG_OFFSET)
74 #define DI_DISP0_TIME_CONF_3 (0x0140 - MX3FB_REG_OFFSET)
75 #define DI_DISP1_TIME_CONF_1 (0x0144 - MX3FB_REG_OFFSET)
76 #define DI_DISP1_TIME_CONF_2 (0x0148 - MX3FB_REG_OFFSET)
77 #define DI_DISP1_TIME_CONF_3 (0x014C - MX3FB_REG_OFFSET)
78 #define DI_DISP2_TIME_CONF_1 (0x0150 - MX3FB_REG_OFFSET)
79 #define DI_DISP2_TIME_CONF_2 (0x0154 - MX3FB_REG_OFFSET)
80 #define DI_DISP2_TIME_CONF_3 (0x0158 - MX3FB_REG_OFFSET)
81 #define DI_DISP3_TIME_CONF (0x015C - MX3FB_REG_OFFSET)
82 #define DI_DISP0_DB0_MAP (0x0160 - MX3FB_REG_OFFSET)
83 #define DI_DISP0_DB1_MAP (0x0164 - MX3FB_REG_OFFSET)
84 #define DI_DISP0_DB2_MAP (0x0168 - MX3FB_REG_OFFSET)
85 #define DI_DISP0_CB0_MAP (0x016C - MX3FB_REG_OFFSET)
86 #define DI_DISP0_CB1_MAP (0x0170 - MX3FB_REG_OFFSET)
87 #define DI_DISP0_CB2_MAP (0x0174 - MX3FB_REG_OFFSET)
88 #define DI_DISP1_DB0_MAP (0x0178 - MX3FB_REG_OFFSET)
89 #define DI_DISP1_DB1_MAP (0x017C - MX3FB_REG_OFFSET)
90 #define DI_DISP1_DB2_MAP (0x0180 - MX3FB_REG_OFFSET)
91 #define DI_DISP1_CB0_MAP (0x0184 - MX3FB_REG_OFFSET)
92 #define DI_DISP1_CB1_MAP (0x0188 - MX3FB_REG_OFFSET)
93 #define DI_DISP1_CB2_MAP (0x018C - MX3FB_REG_OFFSET)
94 #define DI_DISP2_DB0_MAP (0x0190 - MX3FB_REG_OFFSET)
95 #define DI_DISP2_DB1_MAP (0x0194 - MX3FB_REG_OFFSET)
96 #define DI_DISP2_DB2_MAP (0x0198 - MX3FB_REG_OFFSET)
97 #define DI_DISP2_CB0_MAP (0x019C - MX3FB_REG_OFFSET)
98 #define DI_DISP2_CB1_MAP (0x01A0 - MX3FB_REG_OFFSET)
99 #define DI_DISP2_CB2_MAP (0x01A4 - MX3FB_REG_OFFSET)
100 #define DI_DISP3_B0_MAP (0x01A8 - MX3FB_REG_OFFSET)
101 #define DI_DISP3_B1_MAP (0x01AC - MX3FB_REG_OFFSET)
102 #define DI_DISP3_B2_MAP (0x01B0 - MX3FB_REG_OFFSET)
103 #define DI_DISP_ACC_CC (0x01B4 - MX3FB_REG_OFFSET)
104 #define DI_DISP_LLA_CONF (0x01B8 - MX3FB_REG_OFFSET)
105 #define DI_DISP_LLA_DATA (0x01BC - MX3FB_REG_OFFSET)
106
107 /* DI_DISP_SIG_POL bits */
108 #define DI_D3_VSYNC_POL_SHIFT 28
109 #define DI_D3_HSYNC_POL_SHIFT 27
110 #define DI_D3_DRDY_SHARP_POL_SHIFT 26
111 #define DI_D3_CLK_POL_SHIFT 25
112 #define DI_D3_DATA_POL_SHIFT 24
113
114 /* DI_DISP_IF_CONF bits */
115 #define DI_D3_CLK_IDLE_SHIFT 26
116 #define DI_D3_CLK_SEL_SHIFT 25
117 #define DI_D3_DATAMSK_SHIFT 24
118
119 enum ipu_panel {
120 IPU_PANEL_SHARP_TFT,
121 IPU_PANEL_TFT,
122 };
123
124 struct ipu_di_signal_cfg {
125 unsigned datamask_en:1;
126 unsigned clksel_en:1;
127 unsigned clkidle_en:1;
128 unsigned data_pol:1; /* true = inverted */
129 unsigned clk_pol:1; /* true = rising edge */
130 unsigned enable_pol:1;
131 unsigned Hsync_pol:1; /* true = active high */
132 unsigned Vsync_pol:1;
133 };
134
135 static const struct fb_videomode mx3fb_modedb[] = {
136 {
137 /* 240x320 @ 60 Hz */
138 .name = "Sharp-QVGA",
139 .refresh = 60,
140 .xres = 240,
141 .yres = 320,
142 .pixclock = 185925,
143 .left_margin = 9,
144 .right_margin = 16,
145 .upper_margin = 7,
146 .lower_margin = 9,
147 .hsync_len = 1,
148 .vsync_len = 1,
149 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_SHARP_MODE |
150 FB_SYNC_CLK_INVERT | FB_SYNC_DATA_INVERT |
151 FB_SYNC_CLK_IDLE_EN,
152 .vmode = FB_VMODE_NONINTERLACED,
153 .flag = 0,
154 }, {
155 /* 240x33 @ 60 Hz */
156 .name = "Sharp-CLI",
157 .refresh = 60,
158 .xres = 240,
159 .yres = 33,
160 .pixclock = 185925,
161 .left_margin = 9,
162 .right_margin = 16,
163 .upper_margin = 7,
164 .lower_margin = 9 + 287,
165 .hsync_len = 1,
166 .vsync_len = 1,
167 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_SHARP_MODE |
168 FB_SYNC_CLK_INVERT | FB_SYNC_DATA_INVERT |
169 FB_SYNC_CLK_IDLE_EN,
170 .vmode = FB_VMODE_NONINTERLACED,
171 .flag = 0,
172 }, {
173 /* 640x480 @ 60 Hz */
174 .name = "NEC-VGA",
175 .refresh = 60,
176 .xres = 640,
177 .yres = 480,
178 .pixclock = 38255,
179 .left_margin = 144,
180 .right_margin = 0,
181 .upper_margin = 34,
182 .lower_margin = 40,
183 .hsync_len = 1,
184 .vsync_len = 1,
185 .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_OE_ACT_HIGH,
186 .vmode = FB_VMODE_NONINTERLACED,
187 .flag = 0,
188 }, {
189 /* NTSC TV output */
190 .name = "TV-NTSC",
191 .refresh = 60,
192 .xres = 640,
193 .yres = 480,
194 .pixclock = 37538,
195 .left_margin = 38,
196 .right_margin = 858 - 640 - 38 - 3,
197 .upper_margin = 36,
198 .lower_margin = 518 - 480 - 36 - 1,
199 .hsync_len = 3,
200 .vsync_len = 1,
201 .sync = 0,
202 .vmode = FB_VMODE_NONINTERLACED,
203 .flag = 0,
204 }, {
205 /* PAL TV output */
206 .name = "TV-PAL",
207 .refresh = 50,
208 .xres = 640,
209 .yres = 480,
210 .pixclock = 37538,
211 .left_margin = 38,
212 .right_margin = 960 - 640 - 38 - 32,
213 .upper_margin = 32,
214 .lower_margin = 555 - 480 - 32 - 3,
215 .hsync_len = 32,
216 .vsync_len = 3,
217 .sync = 0,
218 .vmode = FB_VMODE_NONINTERLACED,
219 .flag = 0,
220 }, {
221 /* TV output VGA mode, 640x480 @ 65 Hz */
222 .name = "TV-VGA",
223 .refresh = 60,
224 .xres = 640,
225 .yres = 480,
226 .pixclock = 40574,
227 .left_margin = 35,
228 .right_margin = 45,
229 .upper_margin = 9,
230 .lower_margin = 1,
231 .hsync_len = 46,
232 .vsync_len = 5,
233 .sync = 0,
234 .vmode = FB_VMODE_NONINTERLACED,
235 .flag = 0,
236 },
237 };
238
239 struct mx3fb_data {
240 struct fb_info *fbi;
241 int backlight_level;
242 void __iomem *reg_base;
243 spinlock_t lock;
244 struct device *dev;
245
246 uint32_t h_start_width;
247 uint32_t v_start_width;
248 };
249
250 struct dma_chan_request {
251 struct mx3fb_data *mx3fb;
252 enum ipu_channel id;
253 };
254
255 /* MX3 specific framebuffer information. */
256 struct mx3fb_info {
257 int blank;
258 enum ipu_channel ipu_ch;
259 uint32_t cur_ipu_buf;
260
261 u32 pseudo_palette[16];
262
263 struct completion flip_cmpl;
264 struct mutex mutex; /* Protects fb-ops */
265 struct mx3fb_data *mx3fb;
266 struct idmac_channel *idmac_channel;
267 struct dma_async_tx_descriptor *txd;
268 dma_cookie_t cookie;
269 struct scatterlist sg[2];
270
271 u32 sync; /* preserve var->sync flags */
272 };
273
274 static void mx3fb_dma_done(void *);
275
276 /* Used fb-mode and bpp. Can be set on kernel command line, therefore file-static. */
277 static const char *fb_mode;
278 static unsigned long default_bpp = 16;
279
280 static u32 mx3fb_read_reg(struct mx3fb_data *mx3fb, unsigned long reg)
281 {
282 return __raw_readl(mx3fb->reg_base + reg);
283 }
284
285 static void mx3fb_write_reg(struct mx3fb_data *mx3fb, u32 value, unsigned long reg)
286 {
287 __raw_writel(value, mx3fb->reg_base + reg);
288 }
289
290 static const uint32_t di_mappings[] = {
291 0x1600AAAA, 0x00E05555, 0x00070000, 3, /* RGB888 */
292 0x0005000F, 0x000B000F, 0x0011000F, 1, /* RGB666 */
293 0x0011000F, 0x000B000F, 0x0005000F, 1, /* BGR666 */
294 0x0004003F, 0x000A000F, 0x000F003F, 1 /* RGB565 */
295 };
296
297 static void sdc_fb_init(struct mx3fb_info *fbi)
298 {
299 struct mx3fb_data *mx3fb = fbi->mx3fb;
300 uint32_t reg;
301
302 reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
303
304 mx3fb_write_reg(mx3fb, reg | SDC_COM_BG_EN, SDC_COM_CONF);
305 }
306
307 /* Returns enabled flag before uninit */
308 static uint32_t sdc_fb_uninit(struct mx3fb_info *fbi)
309 {
310 struct mx3fb_data *mx3fb = fbi->mx3fb;
311 uint32_t reg;
312
313 reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
314
315 mx3fb_write_reg(mx3fb, reg & ~SDC_COM_BG_EN, SDC_COM_CONF);
316
317 return reg & SDC_COM_BG_EN;
318 }
319
320 static void sdc_enable_channel(struct mx3fb_info *mx3_fbi)
321 {
322 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
323 struct idmac_channel *ichan = mx3_fbi->idmac_channel;
324 struct dma_chan *dma_chan = &ichan->dma_chan;
325 unsigned long flags;
326 dma_cookie_t cookie;
327
328 if (mx3_fbi->txd)
329 dev_dbg(mx3fb->dev, "mx3fbi %p, desc %p, sg %p\n", mx3_fbi,
330 to_tx_desc(mx3_fbi->txd), to_tx_desc(mx3_fbi->txd)->sg);
331 else
332 dev_dbg(mx3fb->dev, "mx3fbi %p, txd = NULL\n", mx3_fbi);
333
334 /* This enables the channel */
335 if (mx3_fbi->cookie < 0) {
336 mx3_fbi->txd = dma_chan->device->device_prep_slave_sg(dma_chan,
337 &mx3_fbi->sg[0], 1, DMA_TO_DEVICE, DMA_PREP_INTERRUPT);
338 if (!mx3_fbi->txd) {
339 dev_err(mx3fb->dev, "Cannot allocate descriptor on %d\n",
340 dma_chan->chan_id);
341 return;
342 }
343
344 mx3_fbi->txd->callback_param = mx3_fbi->txd;
345 mx3_fbi->txd->callback = mx3fb_dma_done;
346
347 cookie = mx3_fbi->txd->tx_submit(mx3_fbi->txd);
348 dev_dbg(mx3fb->dev, "%d: Submit %p #%d [%c]\n", __LINE__,
349 mx3_fbi->txd, cookie, list_empty(&ichan->queue) ? '-' : '+');
350 } else {
351 if (!mx3_fbi->txd || !mx3_fbi->txd->tx_submit) {
352 dev_err(mx3fb->dev, "Cannot enable channel %d\n",
353 dma_chan->chan_id);
354 return;
355 }
356
357 /* Just re-activate the same buffer */
358 dma_async_issue_pending(dma_chan);
359 cookie = mx3_fbi->cookie;
360 dev_dbg(mx3fb->dev, "%d: Re-submit %p #%d [%c]\n", __LINE__,
361 mx3_fbi->txd, cookie, list_empty(&ichan->queue) ? '-' : '+');
362 }
363
364 if (cookie >= 0) {
365 spin_lock_irqsave(&mx3fb->lock, flags);
366 sdc_fb_init(mx3_fbi);
367 mx3_fbi->cookie = cookie;
368 spin_unlock_irqrestore(&mx3fb->lock, flags);
369 }
370
371 /*
372 * Attention! Without this msleep the channel keeps generating
373 * interrupts. Next sdc_set_brightness() is going to be called
374 * from mx3fb_blank().
375 */
376 msleep(2);
377 }
378
379 static void sdc_disable_channel(struct mx3fb_info *mx3_fbi)
380 {
381 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
382 uint32_t enabled;
383 unsigned long flags;
384
385 spin_lock_irqsave(&mx3fb->lock, flags);
386
387 enabled = sdc_fb_uninit(mx3_fbi);
388
389 spin_unlock_irqrestore(&mx3fb->lock, flags);
390
391 mx3_fbi->txd->chan->device->device_control(mx3_fbi->txd->chan,
392 DMA_TERMINATE_ALL, 0);
393 mx3_fbi->txd = NULL;
394 mx3_fbi->cookie = -EINVAL;
395 }
396
397 /**
398 * sdc_set_window_pos() - set window position of the respective plane.
399 * @mx3fb: mx3fb context.
400 * @channel: IPU DMAC channel ID.
401 * @x_pos: X coordinate relative to the top left corner to place window at.
402 * @y_pos: Y coordinate relative to the top left corner to place window at.
403 * @return: 0 on success or negative error code on failure.
404 */
405 static int sdc_set_window_pos(struct mx3fb_data *mx3fb, enum ipu_channel channel,
406 int16_t x_pos, int16_t y_pos)
407 {
408 if (channel != IDMAC_SDC_0)
409 return -EINVAL;
410
411 x_pos += mx3fb->h_start_width;
412 y_pos += mx3fb->v_start_width;
413
414 mx3fb_write_reg(mx3fb, (x_pos << 16) | y_pos, SDC_BG_POS);
415 return 0;
416 }
417
418 /**
419 * sdc_init_panel() - initialize a synchronous LCD panel.
420 * @mx3fb: mx3fb context.
421 * @panel: panel type.
422 * @pixel_clk: desired pixel clock frequency in Hz.
423 * @width: width of panel in pixels.
424 * @height: height of panel in pixels.
425 * @pixel_fmt: pixel format of buffer as FOURCC ASCII code.
426 * @h_start_width: number of pixel clocks between the HSYNC signal pulse
427 * and the start of valid data.
428 * @h_sync_width: width of the HSYNC signal in units of pixel clocks.
429 * @h_end_width: number of pixel clocks between the end of valid data
430 * and the HSYNC signal for next line.
431 * @v_start_width: number of lines between the VSYNC signal pulse and the
432 * start of valid data.
433 * @v_sync_width: width of the VSYNC signal in units of lines
434 * @v_end_width: number of lines between the end of valid data and the
435 * VSYNC signal for next frame.
436 * @sig: bitfield of signal polarities for LCD interface.
437 * @return: 0 on success or negative error code on failure.
438 */
439 static int sdc_init_panel(struct mx3fb_data *mx3fb, enum ipu_panel panel,
440 uint32_t pixel_clk,
441 uint16_t width, uint16_t height,
442 enum pixel_fmt pixel_fmt,
443 uint16_t h_start_width, uint16_t h_sync_width,
444 uint16_t h_end_width, uint16_t v_start_width,
445 uint16_t v_sync_width, uint16_t v_end_width,
446 struct ipu_di_signal_cfg sig)
447 {
448 unsigned long lock_flags;
449 uint32_t reg;
450 uint32_t old_conf;
451 uint32_t div;
452 struct clk *ipu_clk;
453
454 dev_dbg(mx3fb->dev, "panel size = %d x %d", width, height);
455
456 if (v_sync_width == 0 || h_sync_width == 0)
457 return -EINVAL;
458
459 /* Init panel size and blanking periods */
460 reg = ((uint32_t) (h_sync_width - 1) << 26) |
461 ((uint32_t) (width + h_start_width + h_end_width - 1) << 16);
462 mx3fb_write_reg(mx3fb, reg, SDC_HOR_CONF);
463
464 #ifdef DEBUG
465 printk(KERN_CONT " hor_conf %x,", reg);
466 #endif
467
468 reg = ((uint32_t) (v_sync_width - 1) << 26) | SDC_V_SYNC_WIDTH_L |
469 ((uint32_t) (height + v_start_width + v_end_width - 1) << 16);
470 mx3fb_write_reg(mx3fb, reg, SDC_VER_CONF);
471
472 #ifdef DEBUG
473 printk(KERN_CONT " ver_conf %x\n", reg);
474 #endif
475
476 mx3fb->h_start_width = h_start_width;
477 mx3fb->v_start_width = v_start_width;
478
479 switch (panel) {
480 case IPU_PANEL_SHARP_TFT:
481 mx3fb_write_reg(mx3fb, 0x00FD0102L, SDC_SHARP_CONF_1);
482 mx3fb_write_reg(mx3fb, 0x00F500F4L, SDC_SHARP_CONF_2);
483 mx3fb_write_reg(mx3fb, SDC_COM_SHARP | SDC_COM_TFT_COLOR, SDC_COM_CONF);
484 break;
485 case IPU_PANEL_TFT:
486 mx3fb_write_reg(mx3fb, SDC_COM_TFT_COLOR, SDC_COM_CONF);
487 break;
488 default:
489 return -EINVAL;
490 }
491
492 /* Init clocking */
493
494 /*
495 * Calculate divider: fractional part is 4 bits so simply multiple by
496 * 2^4 to get fractional part, as long as we stay under ~250MHz and on
497 * i.MX31 it (HSP_CLK) is <= 178MHz. Currently 128.267MHz
498 */
499 ipu_clk = clk_get(mx3fb->dev, NULL);
500 if (!IS_ERR(ipu_clk)) {
501 div = clk_get_rate(ipu_clk) * 16 / pixel_clk;
502 clk_put(ipu_clk);
503 } else {
504 div = 0;
505 }
506
507 if (div < 0x40) { /* Divider less than 4 */
508 dev_dbg(mx3fb->dev,
509 "InitPanel() - Pixel clock divider less than 4\n");
510 div = 0x40;
511 }
512
513 dev_dbg(mx3fb->dev, "pixel clk = %u, divider %u.%u\n",
514 pixel_clk, div >> 4, (div & 7) * 125);
515
516 spin_lock_irqsave(&mx3fb->lock, lock_flags);
517
518 /*
519 * DISP3_IF_CLK_DOWN_WR is half the divider value and 2 fraction bits
520 * fewer. Subtract 1 extra from DISP3_IF_CLK_DOWN_WR based on timing
521 * debug. DISP3_IF_CLK_UP_WR is 0
522 */
523 mx3fb_write_reg(mx3fb, (((div / 8) - 1) << 22) | div, DI_DISP3_TIME_CONF);
524
525 /* DI settings */
526 old_conf = mx3fb_read_reg(mx3fb, DI_DISP_IF_CONF) & 0x78FFFFFF;
527 old_conf |= sig.datamask_en << DI_D3_DATAMSK_SHIFT |
528 sig.clksel_en << DI_D3_CLK_SEL_SHIFT |
529 sig.clkidle_en << DI_D3_CLK_IDLE_SHIFT;
530 mx3fb_write_reg(mx3fb, old_conf, DI_DISP_IF_CONF);
531
532 old_conf = mx3fb_read_reg(mx3fb, DI_DISP_SIG_POL) & 0xE0FFFFFF;
533 old_conf |= sig.data_pol << DI_D3_DATA_POL_SHIFT |
534 sig.clk_pol << DI_D3_CLK_POL_SHIFT |
535 sig.enable_pol << DI_D3_DRDY_SHARP_POL_SHIFT |
536 sig.Hsync_pol << DI_D3_HSYNC_POL_SHIFT |
537 sig.Vsync_pol << DI_D3_VSYNC_POL_SHIFT;
538 mx3fb_write_reg(mx3fb, old_conf, DI_DISP_SIG_POL);
539
540 switch (pixel_fmt) {
541 case IPU_PIX_FMT_RGB24:
542 mx3fb_write_reg(mx3fb, di_mappings[0], DI_DISP3_B0_MAP);
543 mx3fb_write_reg(mx3fb, di_mappings[1], DI_DISP3_B1_MAP);
544 mx3fb_write_reg(mx3fb, di_mappings[2], DI_DISP3_B2_MAP);
545 mx3fb_write_reg(mx3fb, mx3fb_read_reg(mx3fb, DI_DISP_ACC_CC) |
546 ((di_mappings[3] - 1) << 12), DI_DISP_ACC_CC);
547 break;
548 case IPU_PIX_FMT_RGB666:
549 mx3fb_write_reg(mx3fb, di_mappings[4], DI_DISP3_B0_MAP);
550 mx3fb_write_reg(mx3fb, di_mappings[5], DI_DISP3_B1_MAP);
551 mx3fb_write_reg(mx3fb, di_mappings[6], DI_DISP3_B2_MAP);
552 mx3fb_write_reg(mx3fb, mx3fb_read_reg(mx3fb, DI_DISP_ACC_CC) |
553 ((di_mappings[7] - 1) << 12), DI_DISP_ACC_CC);
554 break;
555 case IPU_PIX_FMT_BGR666:
556 mx3fb_write_reg(mx3fb, di_mappings[8], DI_DISP3_B0_MAP);
557 mx3fb_write_reg(mx3fb, di_mappings[9], DI_DISP3_B1_MAP);
558 mx3fb_write_reg(mx3fb, di_mappings[10], DI_DISP3_B2_MAP);
559 mx3fb_write_reg(mx3fb, mx3fb_read_reg(mx3fb, DI_DISP_ACC_CC) |
560 ((di_mappings[11] - 1) << 12), DI_DISP_ACC_CC);
561 break;
562 default:
563 mx3fb_write_reg(mx3fb, di_mappings[12], DI_DISP3_B0_MAP);
564 mx3fb_write_reg(mx3fb, di_mappings[13], DI_DISP3_B1_MAP);
565 mx3fb_write_reg(mx3fb, di_mappings[14], DI_DISP3_B2_MAP);
566 mx3fb_write_reg(mx3fb, mx3fb_read_reg(mx3fb, DI_DISP_ACC_CC) |
567 ((di_mappings[15] - 1) << 12), DI_DISP_ACC_CC);
568 break;
569 }
570
571 spin_unlock_irqrestore(&mx3fb->lock, lock_flags);
572
573 dev_dbg(mx3fb->dev, "DI_DISP_IF_CONF = 0x%08X\n",
574 mx3fb_read_reg(mx3fb, DI_DISP_IF_CONF));
575 dev_dbg(mx3fb->dev, "DI_DISP_SIG_POL = 0x%08X\n",
576 mx3fb_read_reg(mx3fb, DI_DISP_SIG_POL));
577 dev_dbg(mx3fb->dev, "DI_DISP3_TIME_CONF = 0x%08X\n",
578 mx3fb_read_reg(mx3fb, DI_DISP3_TIME_CONF));
579
580 return 0;
581 }
582
583 /**
584 * sdc_set_color_key() - set the transparent color key for SDC graphic plane.
585 * @mx3fb: mx3fb context.
586 * @channel: IPU DMAC channel ID.
587 * @enable: boolean to enable or disable color keyl.
588 * @color_key: 24-bit RGB color to use as transparent color key.
589 * @return: 0 on success or negative error code on failure.
590 */
591 static int sdc_set_color_key(struct mx3fb_data *mx3fb, enum ipu_channel channel,
592 bool enable, uint32_t color_key)
593 {
594 uint32_t reg, sdc_conf;
595 unsigned long lock_flags;
596
597 spin_lock_irqsave(&mx3fb->lock, lock_flags);
598
599 sdc_conf = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
600 if (channel == IDMAC_SDC_0)
601 sdc_conf &= ~SDC_COM_GWSEL;
602 else
603 sdc_conf |= SDC_COM_GWSEL;
604
605 if (enable) {
606 reg = mx3fb_read_reg(mx3fb, SDC_GW_CTRL) & 0xFF000000L;
607 mx3fb_write_reg(mx3fb, reg | (color_key & 0x00FFFFFFL),
608 SDC_GW_CTRL);
609
610 sdc_conf |= SDC_COM_KEY_COLOR_G;
611 } else {
612 sdc_conf &= ~SDC_COM_KEY_COLOR_G;
613 }
614 mx3fb_write_reg(mx3fb, sdc_conf, SDC_COM_CONF);
615
616 spin_unlock_irqrestore(&mx3fb->lock, lock_flags);
617
618 return 0;
619 }
620
621 /**
622 * sdc_set_global_alpha() - set global alpha blending modes.
623 * @mx3fb: mx3fb context.
624 * @enable: boolean to enable or disable global alpha blending. If disabled,
625 * per pixel blending is used.
626 * @alpha: global alpha value.
627 * @return: 0 on success or negative error code on failure.
628 */
629 static int sdc_set_global_alpha(struct mx3fb_data *mx3fb, bool enable, uint8_t alpha)
630 {
631 uint32_t reg;
632 unsigned long lock_flags;
633
634 spin_lock_irqsave(&mx3fb->lock, lock_flags);
635
636 if (enable) {
637 reg = mx3fb_read_reg(mx3fb, SDC_GW_CTRL) & 0x00FFFFFFL;
638 mx3fb_write_reg(mx3fb, reg | ((uint32_t) alpha << 24), SDC_GW_CTRL);
639
640 reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
641 mx3fb_write_reg(mx3fb, reg | SDC_COM_GLB_A, SDC_COM_CONF);
642 } else {
643 reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
644 mx3fb_write_reg(mx3fb, reg & ~SDC_COM_GLB_A, SDC_COM_CONF);
645 }
646
647 spin_unlock_irqrestore(&mx3fb->lock, lock_flags);
648
649 return 0;
650 }
651
652 static void sdc_set_brightness(struct mx3fb_data *mx3fb, uint8_t value)
653 {
654 dev_dbg(mx3fb->dev, "%s: value = %d\n", __func__, value);
655 /* This might be board-specific */
656 mx3fb_write_reg(mx3fb, 0x03000000UL | value << 16, SDC_PWM_CTRL);
657 return;
658 }
659
660 static uint32_t bpp_to_pixfmt(int bpp)
661 {
662 uint32_t pixfmt = 0;
663 switch (bpp) {
664 case 24:
665 pixfmt = IPU_PIX_FMT_BGR24;
666 break;
667 case 32:
668 pixfmt = IPU_PIX_FMT_BGR32;
669 break;
670 case 16:
671 pixfmt = IPU_PIX_FMT_RGB565;
672 break;
673 }
674 return pixfmt;
675 }
676
677 static int mx3fb_blank(int blank, struct fb_info *fbi);
678 static int mx3fb_map_video_memory(struct fb_info *fbi, unsigned int mem_len,
679 bool lock);
680 static int mx3fb_unmap_video_memory(struct fb_info *fbi);
681
682 /**
683 * mx3fb_set_fix() - set fixed framebuffer parameters from variable settings.
684 * @info: framebuffer information pointer
685 * @return: 0 on success or negative error code on failure.
686 */
687 static int mx3fb_set_fix(struct fb_info *fbi)
688 {
689 struct fb_fix_screeninfo *fix = &fbi->fix;
690 struct fb_var_screeninfo *var = &fbi->var;
691
692 strncpy(fix->id, "DISP3 BG", 8);
693
694 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
695
696 fix->type = FB_TYPE_PACKED_PIXELS;
697 fix->accel = FB_ACCEL_NONE;
698 fix->visual = FB_VISUAL_TRUECOLOR;
699 fix->xpanstep = 1;
700 fix->ypanstep = 1;
701
702 return 0;
703 }
704
705 static void mx3fb_dma_done(void *arg)
706 {
707 struct idmac_tx_desc *tx_desc = to_tx_desc(arg);
708 struct dma_chan *chan = tx_desc->txd.chan;
709 struct idmac_channel *ichannel = to_idmac_chan(chan);
710 struct mx3fb_data *mx3fb = ichannel->client;
711 struct mx3fb_info *mx3_fbi = mx3fb->fbi->par;
712
713 dev_dbg(mx3fb->dev, "irq %d callback\n", ichannel->eof_irq);
714
715 /* We only need one interrupt, it will be re-enabled as needed */
716 disable_irq_nosync(ichannel->eof_irq);
717
718 complete(&mx3_fbi->flip_cmpl);
719 }
720
721 static int __set_par(struct fb_info *fbi, bool lock)
722 {
723 u32 mem_len;
724 struct ipu_di_signal_cfg sig_cfg;
725 enum ipu_panel mode = IPU_PANEL_TFT;
726 struct mx3fb_info *mx3_fbi = fbi->par;
727 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
728 struct idmac_channel *ichan = mx3_fbi->idmac_channel;
729 struct idmac_video_param *video = &ichan->params.video;
730 struct scatterlist *sg = mx3_fbi->sg;
731
732 /* Total cleanup */
733 if (mx3_fbi->txd)
734 sdc_disable_channel(mx3_fbi);
735
736 mx3fb_set_fix(fbi);
737
738 mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
739 if (mem_len > fbi->fix.smem_len) {
740 if (fbi->fix.smem_start)
741 mx3fb_unmap_video_memory(fbi);
742
743 if (mx3fb_map_video_memory(fbi, mem_len, lock) < 0)
744 return -ENOMEM;
745 }
746
747 sg_init_table(&sg[0], 1);
748 sg_init_table(&sg[1], 1);
749
750 sg_dma_address(&sg[0]) = fbi->fix.smem_start;
751 sg_set_page(&sg[0], virt_to_page(fbi->screen_base),
752 fbi->fix.smem_len,
753 offset_in_page(fbi->screen_base));
754
755 if (mx3_fbi->ipu_ch == IDMAC_SDC_0) {
756 memset(&sig_cfg, 0, sizeof(sig_cfg));
757 if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
758 sig_cfg.Hsync_pol = true;
759 if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
760 sig_cfg.Vsync_pol = true;
761 if (fbi->var.sync & FB_SYNC_CLK_INVERT)
762 sig_cfg.clk_pol = true;
763 if (fbi->var.sync & FB_SYNC_DATA_INVERT)
764 sig_cfg.data_pol = true;
765 if (fbi->var.sync & FB_SYNC_OE_ACT_HIGH)
766 sig_cfg.enable_pol = true;
767 if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
768 sig_cfg.clkidle_en = true;
769 if (fbi->var.sync & FB_SYNC_CLK_SEL_EN)
770 sig_cfg.clksel_en = true;
771 if (fbi->var.sync & FB_SYNC_SHARP_MODE)
772 mode = IPU_PANEL_SHARP_TFT;
773
774 dev_dbg(fbi->device, "pixclock = %ul Hz\n",
775 (u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL));
776
777 if (sdc_init_panel(mx3fb, mode,
778 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
779 fbi->var.xres, fbi->var.yres,
780 (fbi->var.sync & FB_SYNC_SWAP_RGB) ?
781 IPU_PIX_FMT_BGR666 : IPU_PIX_FMT_RGB666,
782 fbi->var.left_margin,
783 fbi->var.hsync_len,
784 fbi->var.right_margin +
785 fbi->var.hsync_len,
786 fbi->var.upper_margin,
787 fbi->var.vsync_len,
788 fbi->var.lower_margin +
789 fbi->var.vsync_len, sig_cfg) != 0) {
790 dev_err(fbi->device,
791 "mx3fb: Error initializing panel.\n");
792 return -EINVAL;
793 }
794 }
795
796 sdc_set_window_pos(mx3fb, mx3_fbi->ipu_ch, 0, 0);
797
798 mx3_fbi->cur_ipu_buf = 0;
799
800 video->out_pixel_fmt = bpp_to_pixfmt(fbi->var.bits_per_pixel);
801 video->out_width = fbi->var.xres;
802 video->out_height = fbi->var.yres;
803 video->out_stride = fbi->var.xres_virtual;
804
805 if (mx3_fbi->blank == FB_BLANK_UNBLANK)
806 sdc_enable_channel(mx3_fbi);
807
808 return 0;
809 }
810
811 /**
812 * mx3fb_set_par() - set framebuffer parameters and change the operating mode.
813 * @fbi: framebuffer information pointer.
814 * @return: 0 on success or negative error code on failure.
815 */
816 static int mx3fb_set_par(struct fb_info *fbi)
817 {
818 struct mx3fb_info *mx3_fbi = fbi->par;
819 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
820 struct idmac_channel *ichan = mx3_fbi->idmac_channel;
821 int ret;
822
823 dev_dbg(mx3fb->dev, "%s [%c]\n", __func__, list_empty(&ichan->queue) ? '-' : '+');
824
825 mutex_lock(&mx3_fbi->mutex);
826
827 ret = __set_par(fbi, true);
828
829 mutex_unlock(&mx3_fbi->mutex);
830
831 return ret;
832 }
833
834 /**
835 * mx3fb_check_var() - check and adjust framebuffer variable parameters.
836 * @var: framebuffer variable parameters
837 * @fbi: framebuffer information pointer
838 */
839 static int mx3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
840 {
841 struct mx3fb_info *mx3_fbi = fbi->par;
842 u32 vtotal;
843 u32 htotal;
844
845 dev_dbg(fbi->device, "%s\n", __func__);
846
847 if (var->xres_virtual < var->xres)
848 var->xres_virtual = var->xres;
849 if (var->yres_virtual < var->yres)
850 var->yres_virtual = var->yres;
851
852 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
853 (var->bits_per_pixel != 16))
854 var->bits_per_pixel = default_bpp;
855
856 switch (var->bits_per_pixel) {
857 case 16:
858 var->red.length = 5;
859 var->red.offset = 11;
860 var->red.msb_right = 0;
861
862 var->green.length = 6;
863 var->green.offset = 5;
864 var->green.msb_right = 0;
865
866 var->blue.length = 5;
867 var->blue.offset = 0;
868 var->blue.msb_right = 0;
869
870 var->transp.length = 0;
871 var->transp.offset = 0;
872 var->transp.msb_right = 0;
873 break;
874 case 24:
875 var->red.length = 8;
876 var->red.offset = 16;
877 var->red.msb_right = 0;
878
879 var->green.length = 8;
880 var->green.offset = 8;
881 var->green.msb_right = 0;
882
883 var->blue.length = 8;
884 var->blue.offset = 0;
885 var->blue.msb_right = 0;
886
887 var->transp.length = 0;
888 var->transp.offset = 0;
889 var->transp.msb_right = 0;
890 break;
891 case 32:
892 var->red.length = 8;
893 var->red.offset = 16;
894 var->red.msb_right = 0;
895
896 var->green.length = 8;
897 var->green.offset = 8;
898 var->green.msb_right = 0;
899
900 var->blue.length = 8;
901 var->blue.offset = 0;
902 var->blue.msb_right = 0;
903
904 var->transp.length = 8;
905 var->transp.offset = 24;
906 var->transp.msb_right = 0;
907 break;
908 }
909
910 if (var->pixclock < 1000) {
911 htotal = var->xres + var->right_margin + var->hsync_len +
912 var->left_margin;
913 vtotal = var->yres + var->lower_margin + var->vsync_len +
914 var->upper_margin;
915 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
916 var->pixclock = KHZ2PICOS(var->pixclock);
917 dev_dbg(fbi->device, "pixclock set for 60Hz refresh = %u ps\n",
918 var->pixclock);
919 }
920
921 var->height = -1;
922 var->width = -1;
923 var->grayscale = 0;
924
925 /* Preserve sync flags */
926 var->sync |= mx3_fbi->sync;
927 mx3_fbi->sync |= var->sync;
928
929 return 0;
930 }
931
932 static u32 chan_to_field(unsigned int chan, struct fb_bitfield *bf)
933 {
934 chan &= 0xffff;
935 chan >>= 16 - bf->length;
936 return chan << bf->offset;
937 }
938
939 static int mx3fb_setcolreg(unsigned int regno, unsigned int red,
940 unsigned int green, unsigned int blue,
941 unsigned int trans, struct fb_info *fbi)
942 {
943 struct mx3fb_info *mx3_fbi = fbi->par;
944 u32 val;
945 int ret = 1;
946
947 dev_dbg(fbi->device, "%s, regno = %u\n", __func__, regno);
948
949 mutex_lock(&mx3_fbi->mutex);
950 /*
951 * If greyscale is true, then we convert the RGB value
952 * to greyscale no matter what visual we are using.
953 */
954 if (fbi->var.grayscale)
955 red = green = blue = (19595 * red + 38470 * green +
956 7471 * blue) >> 16;
957 switch (fbi->fix.visual) {
958 case FB_VISUAL_TRUECOLOR:
959 /*
960 * 16-bit True Colour. We encode the RGB value
961 * according to the RGB bitfield information.
962 */
963 if (regno < 16) {
964 u32 *pal = fbi->pseudo_palette;
965
966 val = chan_to_field(red, &fbi->var.red);
967 val |= chan_to_field(green, &fbi->var.green);
968 val |= chan_to_field(blue, &fbi->var.blue);
969
970 pal[regno] = val;
971
972 ret = 0;
973 }
974 break;
975
976 case FB_VISUAL_STATIC_PSEUDOCOLOR:
977 case FB_VISUAL_PSEUDOCOLOR:
978 break;
979 }
980 mutex_unlock(&mx3_fbi->mutex);
981
982 return ret;
983 }
984
985 static void __blank(int blank, struct fb_info *fbi)
986 {
987 struct mx3fb_info *mx3_fbi = fbi->par;
988 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
989
990 mx3_fbi->blank = blank;
991
992 switch (blank) {
993 case FB_BLANK_POWERDOWN:
994 case FB_BLANK_VSYNC_SUSPEND:
995 case FB_BLANK_HSYNC_SUSPEND:
996 case FB_BLANK_NORMAL:
997 sdc_set_brightness(mx3fb, 0);
998 memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
999 /* Give LCD time to update - enough for 50 and 60 Hz */
1000 msleep(25);
1001 sdc_disable_channel(mx3_fbi);
1002 break;
1003 case FB_BLANK_UNBLANK:
1004 sdc_enable_channel(mx3_fbi);
1005 sdc_set_brightness(mx3fb, mx3fb->backlight_level);
1006 break;
1007 }
1008 }
1009
1010 /**
1011 * mx3fb_blank() - blank the display.
1012 */
1013 static int mx3fb_blank(int blank, struct fb_info *fbi)
1014 {
1015 struct mx3fb_info *mx3_fbi = fbi->par;
1016
1017 dev_dbg(fbi->device, "%s, blank = %d, base %p, len %u\n", __func__,
1018 blank, fbi->screen_base, fbi->fix.smem_len);
1019
1020 if (mx3_fbi->blank == blank)
1021 return 0;
1022
1023 mutex_lock(&mx3_fbi->mutex);
1024 __blank(blank, fbi);
1025 mutex_unlock(&mx3_fbi->mutex);
1026
1027 return 0;
1028 }
1029
1030 /**
1031 * mx3fb_pan_display() - pan or wrap the display
1032 * @var: variable screen buffer information.
1033 * @info: framebuffer information pointer.
1034 *
1035 * We look only at xoffset, yoffset and the FB_VMODE_YWRAP flag
1036 */
1037 static int mx3fb_pan_display(struct fb_var_screeninfo *var,
1038 struct fb_info *fbi)
1039 {
1040 struct mx3fb_info *mx3_fbi = fbi->par;
1041 u32 y_bottom;
1042 unsigned long base;
1043 off_t offset;
1044 dma_cookie_t cookie;
1045 struct scatterlist *sg = mx3_fbi->sg;
1046 struct dma_chan *dma_chan = &mx3_fbi->idmac_channel->dma_chan;
1047 struct dma_async_tx_descriptor *txd;
1048 int ret;
1049
1050 dev_dbg(fbi->device, "%s [%c]\n", __func__,
1051 list_empty(&mx3_fbi->idmac_channel->queue) ? '-' : '+');
1052
1053 if (var->xoffset > 0) {
1054 dev_dbg(fbi->device, "x panning not supported\n");
1055 return -EINVAL;
1056 }
1057
1058 if (fbi->var.xoffset == var->xoffset &&
1059 fbi->var.yoffset == var->yoffset)
1060 return 0; /* No change, do nothing */
1061
1062 y_bottom = var->yoffset;
1063
1064 if (!(var->vmode & FB_VMODE_YWRAP))
1065 y_bottom += var->yres;
1066
1067 if (y_bottom > fbi->var.yres_virtual)
1068 return -EINVAL;
1069
1070 mutex_lock(&mx3_fbi->mutex);
1071
1072 offset = (var->yoffset * var->xres_virtual + var->xoffset) *
1073 (var->bits_per_pixel / 8);
1074 base = fbi->fix.smem_start + offset;
1075
1076 dev_dbg(fbi->device, "Updating SDC BG buf %d address=0x%08lX\n",
1077 mx3_fbi->cur_ipu_buf, base);
1078
1079 /*
1080 * We enable the End of Frame interrupt, which will free a tx-descriptor,
1081 * which we will need for the next device_prep_slave_sg(). The
1082 * IRQ-handler will disable the IRQ again.
1083 */
1084 init_completion(&mx3_fbi->flip_cmpl);
1085 enable_irq(mx3_fbi->idmac_channel->eof_irq);
1086
1087 ret = wait_for_completion_timeout(&mx3_fbi->flip_cmpl, HZ / 10);
1088 if (ret <= 0) {
1089 mutex_unlock(&mx3_fbi->mutex);
1090 dev_info(fbi->device, "Panning failed due to %s\n", ret < 0 ?
1091 "user interrupt" : "timeout");
1092 disable_irq(mx3_fbi->idmac_channel->eof_irq);
1093 return ret ? : -ETIMEDOUT;
1094 }
1095
1096 mx3_fbi->cur_ipu_buf = !mx3_fbi->cur_ipu_buf;
1097
1098 sg_dma_address(&sg[mx3_fbi->cur_ipu_buf]) = base;
1099 sg_set_page(&sg[mx3_fbi->cur_ipu_buf],
1100 virt_to_page(fbi->screen_base + offset), fbi->fix.smem_len,
1101 offset_in_page(fbi->screen_base + offset));
1102
1103 if (mx3_fbi->txd)
1104 async_tx_ack(mx3_fbi->txd);
1105
1106 txd = dma_chan->device->device_prep_slave_sg(dma_chan, sg +
1107 mx3_fbi->cur_ipu_buf, 1, DMA_TO_DEVICE, DMA_PREP_INTERRUPT);
1108 if (!txd) {
1109 dev_err(fbi->device,
1110 "Error preparing a DMA transaction descriptor.\n");
1111 mutex_unlock(&mx3_fbi->mutex);
1112 return -EIO;
1113 }
1114
1115 txd->callback_param = txd;
1116 txd->callback = mx3fb_dma_done;
1117
1118 /*
1119 * Emulate original mx3fb behaviour: each new call to idmac_tx_submit()
1120 * should switch to another buffer
1121 */
1122 cookie = txd->tx_submit(txd);
1123 dev_dbg(fbi->device, "%d: Submit %p #%d\n", __LINE__, txd, cookie);
1124 if (cookie < 0) {
1125 dev_err(fbi->device,
1126 "Error updating SDC buf %d to address=0x%08lX\n",
1127 mx3_fbi->cur_ipu_buf, base);
1128 mutex_unlock(&mx3_fbi->mutex);
1129 return -EIO;
1130 }
1131
1132 mx3_fbi->txd = txd;
1133
1134 fbi->var.xoffset = var->xoffset;
1135 fbi->var.yoffset = var->yoffset;
1136
1137 if (var->vmode & FB_VMODE_YWRAP)
1138 fbi->var.vmode |= FB_VMODE_YWRAP;
1139 else
1140 fbi->var.vmode &= ~FB_VMODE_YWRAP;
1141
1142 mutex_unlock(&mx3_fbi->mutex);
1143
1144 dev_dbg(fbi->device, "Update complete\n");
1145
1146 return 0;
1147 }
1148
1149 /*
1150 * This structure contains the pointers to the control functions that are
1151 * invoked by the core framebuffer driver to perform operations like
1152 * blitting, rectangle filling, copy regions and cursor definition.
1153 */
1154 static struct fb_ops mx3fb_ops = {
1155 .owner = THIS_MODULE,
1156 .fb_set_par = mx3fb_set_par,
1157 .fb_check_var = mx3fb_check_var,
1158 .fb_setcolreg = mx3fb_setcolreg,
1159 .fb_pan_display = mx3fb_pan_display,
1160 .fb_fillrect = cfb_fillrect,
1161 .fb_copyarea = cfb_copyarea,
1162 .fb_imageblit = cfb_imageblit,
1163 .fb_blank = mx3fb_blank,
1164 };
1165
1166 #ifdef CONFIG_PM
1167 /*
1168 * Power management hooks. Note that we won't be called from IRQ context,
1169 * unlike the blank functions above, so we may sleep.
1170 */
1171
1172 /*
1173 * Suspends the framebuffer and blanks the screen. Power management support
1174 */
1175 static int mx3fb_suspend(struct platform_device *pdev, pm_message_t state)
1176 {
1177 struct mx3fb_data *mx3fb = platform_get_drvdata(pdev);
1178 struct mx3fb_info *mx3_fbi = mx3fb->fbi->par;
1179
1180 console_lock();
1181 fb_set_suspend(mx3fb->fbi, 1);
1182 console_unlock();
1183
1184 if (mx3_fbi->blank == FB_BLANK_UNBLANK) {
1185 sdc_disable_channel(mx3_fbi);
1186 sdc_set_brightness(mx3fb, 0);
1187
1188 }
1189 return 0;
1190 }
1191
1192 /*
1193 * Resumes the framebuffer and unblanks the screen. Power management support
1194 */
1195 static int mx3fb_resume(struct platform_device *pdev)
1196 {
1197 struct mx3fb_data *mx3fb = platform_get_drvdata(pdev);
1198 struct mx3fb_info *mx3_fbi = mx3fb->fbi->par;
1199
1200 if (mx3_fbi->blank == FB_BLANK_UNBLANK) {
1201 sdc_enable_channel(mx3_fbi);
1202 sdc_set_brightness(mx3fb, mx3fb->backlight_level);
1203 }
1204
1205 console_lock();
1206 fb_set_suspend(mx3fb->fbi, 0);
1207 console_unlock();
1208
1209 return 0;
1210 }
1211 #else
1212 #define mx3fb_suspend NULL
1213 #define mx3fb_resume NULL
1214 #endif
1215
1216 /*
1217 * Main framebuffer functions
1218 */
1219
1220 /**
1221 * mx3fb_map_video_memory() - allocates the DRAM memory for the frame buffer.
1222 * @fbi: framebuffer information pointer
1223 * @mem_len: length of mapped memory
1224 * @lock: do not lock during initialisation
1225 * @return: Error code indicating success or failure
1226 *
1227 * This buffer is remapped into a non-cached, non-buffered, memory region to
1228 * allow palette and pixel writes to occur without flushing the cache. Once this
1229 * area is remapped, all virtual memory access to the video memory should occur
1230 * at the new region.
1231 */
1232 static int mx3fb_map_video_memory(struct fb_info *fbi, unsigned int mem_len,
1233 bool lock)
1234 {
1235 int retval = 0;
1236 dma_addr_t addr;
1237
1238 fbi->screen_base = dma_alloc_writecombine(fbi->device,
1239 mem_len,
1240 &addr, GFP_DMA);
1241
1242 if (!fbi->screen_base) {
1243 dev_err(fbi->device, "Cannot allocate %u bytes framebuffer memory\n",
1244 mem_len);
1245 retval = -EBUSY;
1246 goto err0;
1247 }
1248
1249 if (lock)
1250 mutex_lock(&fbi->mm_lock);
1251 fbi->fix.smem_start = addr;
1252 fbi->fix.smem_len = mem_len;
1253 if (lock)
1254 mutex_unlock(&fbi->mm_lock);
1255
1256 dev_dbg(fbi->device, "allocated fb @ p=0x%08x, v=0x%p, size=%d.\n",
1257 (uint32_t) fbi->fix.smem_start, fbi->screen_base, fbi->fix.smem_len);
1258
1259 fbi->screen_size = fbi->fix.smem_len;
1260
1261 /* Clear the screen */
1262 memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
1263
1264 return 0;
1265
1266 err0:
1267 fbi->fix.smem_len = 0;
1268 fbi->fix.smem_start = 0;
1269 fbi->screen_base = NULL;
1270 return retval;
1271 }
1272
1273 /**
1274 * mx3fb_unmap_video_memory() - de-allocate frame buffer memory.
1275 * @fbi: framebuffer information pointer
1276 * @return: error code indicating success or failure
1277 */
1278 static int mx3fb_unmap_video_memory(struct fb_info *fbi)
1279 {
1280 dma_free_writecombine(fbi->device, fbi->fix.smem_len,
1281 fbi->screen_base, fbi->fix.smem_start);
1282
1283 fbi->screen_base = 0;
1284 mutex_lock(&fbi->mm_lock);
1285 fbi->fix.smem_start = 0;
1286 fbi->fix.smem_len = 0;
1287 mutex_unlock(&fbi->mm_lock);
1288 return 0;
1289 }
1290
1291 /**
1292 * mx3fb_init_fbinfo() - initialize framebuffer information object.
1293 * @return: initialized framebuffer structure.
1294 */
1295 static struct fb_info *mx3fb_init_fbinfo(struct device *dev, struct fb_ops *ops)
1296 {
1297 struct fb_info *fbi;
1298 struct mx3fb_info *mx3fbi;
1299 int ret;
1300
1301 /* Allocate sufficient memory for the fb structure */
1302 fbi = framebuffer_alloc(sizeof(struct mx3fb_info), dev);
1303 if (!fbi)
1304 return NULL;
1305
1306 mx3fbi = fbi->par;
1307 mx3fbi->cookie = -EINVAL;
1308 mx3fbi->cur_ipu_buf = 0;
1309
1310 fbi->var.activate = FB_ACTIVATE_NOW;
1311
1312 fbi->fbops = ops;
1313 fbi->flags = FBINFO_FLAG_DEFAULT;
1314 fbi->pseudo_palette = mx3fbi->pseudo_palette;
1315
1316 mutex_init(&mx3fbi->mutex);
1317
1318 /* Allocate colormap */
1319 ret = fb_alloc_cmap(&fbi->cmap, 16, 0);
1320 if (ret < 0) {
1321 framebuffer_release(fbi);
1322 return NULL;
1323 }
1324
1325 return fbi;
1326 }
1327
1328 static int init_fb_chan(struct mx3fb_data *mx3fb, struct idmac_channel *ichan)
1329 {
1330 struct device *dev = mx3fb->dev;
1331 struct mx3fb_platform_data *mx3fb_pdata = dev->platform_data;
1332 const char *name = mx3fb_pdata->name;
1333 unsigned int irq;
1334 struct fb_info *fbi;
1335 struct mx3fb_info *mx3fbi;
1336 const struct fb_videomode *mode;
1337 int ret, num_modes;
1338
1339 ichan->client = mx3fb;
1340 irq = ichan->eof_irq;
1341
1342 if (ichan->dma_chan.chan_id != IDMAC_SDC_0)
1343 return -EINVAL;
1344
1345 fbi = mx3fb_init_fbinfo(dev, &mx3fb_ops);
1346 if (!fbi)
1347 return -ENOMEM;
1348
1349 if (!fb_mode)
1350 fb_mode = name;
1351
1352 if (!fb_mode) {
1353 ret = -EINVAL;
1354 goto emode;
1355 }
1356
1357 if (mx3fb_pdata->mode && mx3fb_pdata->num_modes) {
1358 mode = mx3fb_pdata->mode;
1359 num_modes = mx3fb_pdata->num_modes;
1360 } else {
1361 mode = mx3fb_modedb;
1362 num_modes = ARRAY_SIZE(mx3fb_modedb);
1363 }
1364
1365 if (!fb_find_mode(&fbi->var, fbi, fb_mode, mode,
1366 num_modes, NULL, default_bpp)) {
1367 ret = -EBUSY;
1368 goto emode;
1369 }
1370
1371 fb_videomode_to_modelist(mode, num_modes, &fbi->modelist);
1372
1373 /* Default Y virtual size is 2x panel size */
1374 fbi->var.yres_virtual = fbi->var.yres * 2;
1375
1376 mx3fb->fbi = fbi;
1377
1378 /* set Display Interface clock period */
1379 mx3fb_write_reg(mx3fb, 0x00100010L, DI_HSP_CLK_PER);
1380 /* Might need to trigger HSP clock change - see 44.3.3.8.5 */
1381
1382 sdc_set_brightness(mx3fb, 255);
1383 sdc_set_global_alpha(mx3fb, true, 0xFF);
1384 sdc_set_color_key(mx3fb, IDMAC_SDC_0, false, 0);
1385
1386 mx3fbi = fbi->par;
1387 mx3fbi->idmac_channel = ichan;
1388 mx3fbi->ipu_ch = ichan->dma_chan.chan_id;
1389 mx3fbi->mx3fb = mx3fb;
1390 mx3fbi->blank = FB_BLANK_NORMAL;
1391
1392 init_completion(&mx3fbi->flip_cmpl);
1393 disable_irq(ichan->eof_irq);
1394 dev_dbg(mx3fb->dev, "disabling irq %d\n", ichan->eof_irq);
1395 ret = __set_par(fbi, false);
1396 if (ret < 0)
1397 goto esetpar;
1398
1399 __blank(FB_BLANK_UNBLANK, fbi);
1400
1401 dev_info(dev, "registered, using mode %s\n", fb_mode);
1402
1403 ret = register_framebuffer(fbi);
1404 if (ret < 0)
1405 goto erfb;
1406
1407 return 0;
1408
1409 erfb:
1410 esetpar:
1411 emode:
1412 fb_dealloc_cmap(&fbi->cmap);
1413 framebuffer_release(fbi);
1414
1415 return ret;
1416 }
1417
1418 static bool chan_filter(struct dma_chan *chan, void *arg)
1419 {
1420 struct dma_chan_request *rq = arg;
1421 struct device *dev;
1422 struct mx3fb_platform_data *mx3fb_pdata;
1423
1424 if (!imx_dma_is_ipu(chan))
1425 return false;
1426
1427 if (!rq)
1428 return false;
1429
1430 dev = rq->mx3fb->dev;
1431 mx3fb_pdata = dev->platform_data;
1432
1433 return rq->id == chan->chan_id &&
1434 mx3fb_pdata->dma_dev == chan->device->dev;
1435 }
1436
1437 static void release_fbi(struct fb_info *fbi)
1438 {
1439 mx3fb_unmap_video_memory(fbi);
1440
1441 fb_dealloc_cmap(&fbi->cmap);
1442
1443 unregister_framebuffer(fbi);
1444 framebuffer_release(fbi);
1445 }
1446
1447 static int mx3fb_probe(struct platform_device *pdev)
1448 {
1449 struct device *dev = &pdev->dev;
1450 int ret;
1451 struct resource *sdc_reg;
1452 struct mx3fb_data *mx3fb;
1453 dma_cap_mask_t mask;
1454 struct dma_chan *chan;
1455 struct dma_chan_request rq;
1456
1457 /*
1458 * Display Interface (DI) and Synchronous Display Controller (SDC)
1459 * registers
1460 */
1461 sdc_reg = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1462 if (!sdc_reg)
1463 return -EINVAL;
1464
1465 mx3fb = kzalloc(sizeof(*mx3fb), GFP_KERNEL);
1466 if (!mx3fb)
1467 return -ENOMEM;
1468
1469 spin_lock_init(&mx3fb->lock);
1470
1471 mx3fb->reg_base = ioremap(sdc_reg->start, resource_size(sdc_reg));
1472 if (!mx3fb->reg_base) {
1473 ret = -ENOMEM;
1474 goto eremap;
1475 }
1476
1477 pr_debug("Remapped %pR at %p\n", sdc_reg, mx3fb->reg_base);
1478
1479 /* IDMAC interface */
1480 dmaengine_get();
1481
1482 mx3fb->dev = dev;
1483 platform_set_drvdata(pdev, mx3fb);
1484
1485 rq.mx3fb = mx3fb;
1486
1487 dma_cap_zero(mask);
1488 dma_cap_set(DMA_SLAVE, mask);
1489 dma_cap_set(DMA_PRIVATE, mask);
1490 rq.id = IDMAC_SDC_0;
1491 chan = dma_request_channel(mask, chan_filter, &rq);
1492 if (!chan) {
1493 ret = -EBUSY;
1494 goto ersdc0;
1495 }
1496
1497 mx3fb->backlight_level = 255;
1498
1499 ret = init_fb_chan(mx3fb, to_idmac_chan(chan));
1500 if (ret < 0)
1501 goto eisdc0;
1502
1503 return 0;
1504
1505 eisdc0:
1506 dma_release_channel(chan);
1507 ersdc0:
1508 dmaengine_put();
1509 iounmap(mx3fb->reg_base);
1510 eremap:
1511 kfree(mx3fb);
1512 dev_err(dev, "mx3fb: failed to register fb\n");
1513 return ret;
1514 }
1515
1516 static int mx3fb_remove(struct platform_device *dev)
1517 {
1518 struct mx3fb_data *mx3fb = platform_get_drvdata(dev);
1519 struct fb_info *fbi = mx3fb->fbi;
1520 struct mx3fb_info *mx3_fbi = fbi->par;
1521 struct dma_chan *chan;
1522
1523 chan = &mx3_fbi->idmac_channel->dma_chan;
1524 release_fbi(fbi);
1525
1526 dma_release_channel(chan);
1527 dmaengine_put();
1528
1529 iounmap(mx3fb->reg_base);
1530 kfree(mx3fb);
1531 return 0;
1532 }
1533
1534 static struct platform_driver mx3fb_driver = {
1535 .driver = {
1536 .name = MX3FB_NAME,
1537 },
1538 .probe = mx3fb_probe,
1539 .remove = mx3fb_remove,
1540 .suspend = mx3fb_suspend,
1541 .resume = mx3fb_resume,
1542 };
1543
1544 /*
1545 * Parse user specified options (`video=mx3fb:')
1546 * example:
1547 * video=mx3fb:bpp=16
1548 */
1549 static int __init mx3fb_setup(void)
1550 {
1551 #ifndef MODULE
1552 char *opt, *options = NULL;
1553
1554 if (fb_get_options("mx3fb", &options))
1555 return -ENODEV;
1556
1557 if (!options || !*options)
1558 return 0;
1559
1560 while ((opt = strsep(&options, ",")) != NULL) {
1561 if (!*opt)
1562 continue;
1563 if (!strncmp(opt, "bpp=", 4))
1564 default_bpp = simple_strtoul(opt + 4, NULL, 0);
1565 else
1566 fb_mode = opt;
1567 }
1568 #endif
1569
1570 return 0;
1571 }
1572
1573 static int __init mx3fb_init(void)
1574 {
1575 int ret = mx3fb_setup();
1576
1577 if (ret < 0)
1578 return ret;
1579
1580 ret = platform_driver_register(&mx3fb_driver);
1581 return ret;
1582 }
1583
1584 static void __exit mx3fb_exit(void)
1585 {
1586 platform_driver_unregister(&mx3fb_driver);
1587 }
1588
1589 module_init(mx3fb_init);
1590 module_exit(mx3fb_exit);
1591
1592 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
1593 MODULE_DESCRIPTION("MX3 framebuffer driver");
1594 MODULE_ALIAS("platform:" MX3FB_NAME);
1595 MODULE_LICENSE("GPL v2");
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